题解 | 点到直线距离

import math

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

class Line:
    def __init__(self, point_a, point_b):
        self.point_a = point_a
        self.point_b = point_b

def get_distance(p, l):
    
    # 计算分子：
    numerator = abs((l.point_a.x-p.x)*(l.point_b.y-p.y)-(l.point_a.y-p.y)*(l.point_b.x-p.x))
    # 计算分母：
    denominator = math.sqrt((l.point_b.x-l.point_a.x)**2+(l.point_b.y-l.point_a.y)**2)
    return numerator / denominator


def main():
    a, b = map(int, input().split())
    sx, sy, tx, ty = map(int, input().split())
    
    point_a = Point(sx, sy)
    point_b = Point(tx, ty)
    point_c = Point(a, b)
    line = Line(point_a, point_b)
    
    print("{:.2f}".format(get_distance(point_c, line)))

if __name__ == "__main__":
    main()